//package com.markerhub.shiro;
//
//import cn.hutool.json.JSONUtil;
//import com.markerhub.common.lang.Result;
//import com.markerhub.util.JwtUtils;
//import io.jsonwebtoken.Claims;
//import org.apache.shiro.authc.AuthenticationException;
//import org.apache.shiro.authc.AuthenticationToken;
//import org.apache.shiro.authc.ExpiredCredentialsException;
//import org.apache.shiro.web.filter.authc.AuthenticatingFilter;
//import org.apache.shiro.web.util.WebUtils;
//import org.springframework.beans.factory.annotation.Autowired;
//import org.springframework.stereotype.Component;
//import org.springframework.util.StringUtils;
//import org.springframework.web.bind.annotation.RequestMethod;
//
//import javax.servlet.ServletRequest;
//import javax.servlet.ServletResponse;
//import javax.servlet.http.HttpServletRequest;
//import javax.servlet.http.HttpServletResponse;
//import java.io.IOException;
//
//@Component
//public class JwtFilter extends AuthenticatingFilter {
//
//    @Autowired
//    JwtUtils jwtUtils;
//
//    @Override
//    protected AuthenticationToken createToken(ServletRequest servletRequest, ServletResponse servletResponse) throws Exception {
//
//        HttpServletRequest request = (HttpServletRequest) servletRequest;
//        String jwt = request.getHeader("Authorization");
//        if(StringUtils.isEmpty(jwt)) {
//            return null;
//        }
//
//        return new JwtToken(jwt);
//    }
//
//    @Override
//    protected boolean onAccessDenied(ServletRequest servletRequest, ServletResponse servletResponse) throws Exception {
//
//        HttpServletRequest request = (HttpServletRequest) servletRequest;
//        String jwt = request.getHeader("Authorization");
//        if(StringUtils.isEmpty(jwt)) {
//            return true;
//        } else {
//
//            // 校验jwt
//            Claims claim = jwtUtils.getClaimByToken(jwt);
//            if(claim == null || jwtUtils.isTokenExpired(claim.getExpiration())) {
//                throw new ExpiredCredentialsException("token已失效，请重新登录");
//            }
//
//            // 执行登录
//            return executeLogin(servletRequest, servletResponse);
//        }
//    }
//
//    @Override
//    protected boolean onLoginFailure(AuthenticationToken token, AuthenticationException e, ServletRequest request, ServletResponse response) {
//
//        HttpServletResponse httpServletResponse = (HttpServletResponse) response;
//
//        Throwable throwable = e.getCause() == null ? e : e.getCause();
//        Result result = Result.fail(throwable.getMessage());
//        String json = JSONUtil.toJsonStr(result);
//
//        try {
//            httpServletResponse.getWriter().print(json);
//        } catch (IOException ioException) {
//
//        }
//        return false;
//    }
//
//    @Override
//    protected boolean preHandle(ServletRequest request, ServletResponse response) throws Exception {
//
//        HttpServletRequest httpServletRequest = WebUtils.toHttp(request);
//        HttpServletResponse httpServletResponse = WebUtils.toHttp(response);
//        httpServletResponse.setHeader("Access-control-Allow-Origin", httpServletRequest.getHeader("Origin"));
//        httpServletResponse.setHeader("Access-Control-Allow-Methods", "GET,POST,OPTIONS,PUT,DELETE");
//        httpServletResponse.setHeader("Access-Control-Allow-Headers", httpServletRequest.getHeader("Access-Control-Request-Headers"));
//        // 跨域时会首先发送一个OPTIONS请求，这里我们给OPTIONS请求直接返回正常状态
//        if (httpServletRequest.getMethod().equals(RequestMethod.OPTIONS.name())) {
//            httpServletResponse.setStatus(org.springframework.http.HttpStatus.OK.value());
//            return false;
//        }
//
//        return super.preHandle(request, response);
//    }
//}
